Sciences means collecting sensory observation results by systematical effort, and then put the findings into an artifically created order of whatever a kind. This order is called a paradigm, and sometimes paradigms change, fundamentally. Whatever we believe we had found out about the universe, is not the ultimate, everlasting truth, but our mind dancing with the unlimited possebilities of it's own imagination. And that love affair is a truly eternal one.
This I have put in nice words, I think!
In a way I think, that everything that can be imagined, can become a reality, no matter if for good or for worse. As if it is all just a dream. And maybe it is.
"Imagination is more important than knowledge." (Einstein, I think).